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通过使用Ni-化矿催化剂对甲进行部分氧化,研究用于合成气生产的氧化利用情况

Notsawan Swadchaipong¹, Vut Tongnan¹, Panupan Maneesard¹

¹Chemical and Process Engineering, The Sirindhorn International Thai-German Graduate School of Engineering (TGGS), King Mongkut's University of Technology North Bangkok Bangkok 10800 Thailand unalome.w.cpe@tggs-bangkok.org.

|January 31, 2025

概括

/LSCF催化剂在N2O分解和甲 (POM) 部分氧化反应中表现更好. 10%的Ni/LSCF催化剂由于增加了氧气空缺和流动性,特别有效,性能优于纯NiO和LSCF.

科学领域:

催化剂是一种催化剂.
材料科学材料科学材料科学
化学工程是化学工程的重要组成部分.

背景情况:

氧化 (N2O) 是一种强有力的温室气体,其分解对于环境修复至关重要.
甲的部分氧化 (POM) 是合成天然气生产的关键过程,这是一个重要的工业中间产品.
为这些反应开发高效的催化剂对于可持续能源和环境应用至关重要.

研究的目的:

研究Ni/LSCF材料对于N2O分解和POM反应的催化性能.
了解LSCF上加载对催化活性的作用.
阐明控制Ni/LSCF催化剂性能的结构-活性关系.

主要方法:

纯NiO,纯LSCF (La0.3Sr0.7Co0.7Fe0.3O3−x),10%的Ni/LSCF和20%的Ni/LSCF催化剂的合成和表征.
在不同温度下通过N2O分解和POM反应评估催化活性.
使用O2-TPD (温度编程吸附) 和其他表征技术分析催化剂特性.
在优化催化剂上对POM反应的动态分析.

主要成果:

与纯NiO和LSCF相比,Ni/LSCF催化剂在N2O分解和POM中表现出更好的性能.
10%的Ni/LSCF在800°C实现了完全的N2O转化,在较低的温度下表现出更高的活性 (T50=536°C).
对于POM,10%的Ni/LSCF在600°C时表现出高的CH4转化率 (70.9%) 和合成气选择性 (96.6%的CO,97.4%的H2),CH4的反应顺序为2和N2O的反应顺序为0,激活能量为71.8kJmol-1.1.

结论:

Ni/LSCF的增强催化活性归因于增加的氧气空缺和改善的氧气流动性.
10%的Ni/LSCF催化剂是N2O分解和甲部分氧化的有效材料.
优化的Ni负载和更小的Ni晶体体尺寸有助于10%Ni/LSCF催化剂的卓越性能.

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